Cancellation of interference distortions caused by intermodulati

Details Cancellation of interference distortions caused by intermodulati Cancellation of interference distortions caused by intermodulati

1978-03-17

1980-05-20

Olms, Douglas W.

1791004ST, H04H 500

Patent

active

042040914

ABSTRACT:
A crosstalk cancellation circuit includes a pair of input terminals to which interference affected FM signals are applied and a pair of output terminals from which distortionless demodulated signals are delivered. For each transmission channel an envelope detector is provided which is connected to the input terminal to detect the envelope of the FM signal. A closed-loop feedback circuits are cross-coupled across the output terminals to process the signals thereat with the detected envelopes to derive an offset signal for each channel, which is combined with a frequency-demodulated signal of the FM signal of each channel.

REFERENCES:
patent: 3936619 (1976-02-01), Sugimoto et al.
patent: 3943303 (1976-03-01), Masuda et al.
patent: 3985978 (1976-10-01), Cooper
patent: 3989903 (1976-11-01), Cooper et al.

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